<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<dl id="aa">
    <dt>zjj</dt>
    <dd>mbj</dd>
    <dd>mkk</dd>
</dl>
<script>
    //window对象
    console.log(window.innerHeight);
    console.log(window.innerWidth);
    //navigator
    console.log(navigator);
    //screen
    screen.height;
    screen.width;
    //document
    var j = document.getElementById("aa")
    console.log(j);
</script>
</body>
</html>